Die-casting machine.



B. w. CHANDLER.

DIE CASTING MACHINE.

APPLICATION FILED AUG. 10, I9Il- RENEWED SEPT. l2, 19M.

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B. W. CHANDLER.

DIE CASTING MACHINE.

APPLICATION FILED AUG. 10. 1911. RENEWED SEPT. 12. 19M. 1,179,072.

Patented Apr. 11, 1916.

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DIE CASTING MACHINE.

APPLICATION men AUG. 10. 1911; RENEWED SEPT. 12, 1914.

Patented Apr. 11, 1916.

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m I ENTOR.

IVITNILSSES:

- B. W. CHANDLER.

DIE CASTING MACHINE;

APPLICATION FILED AUG. 10, 1911. RENEWED sin. 12. 1914.

Patented Apr. 11, 1916;

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A TTORNEY.

UNITED STATES. PATENT QFFICE.

BENJAMIN W. CHANDLER, 0F INDIANAPOLIS, INDIANA, ASSIGNOR, BY MESNEASSIGN- MENTS, 'IO LAY'ION M. PABKHURST, 0F CHAGBIN FALLS, OHIO.

DIE-CASTING MACHINE.

Specification of Letters Patent.

Application filed. August 10, 1911, Serial No. 643,270. RenewedSeptember 12, 1914. Serial No. 861,473.

To all whom it may concern. 7

Be it known that I, BENJAMIN W. CHAN- DLER, a citizen of the UnitedStates, and a resident of Indianapolis, county of Marion, and StateofIndiana, have invented a certain useful Die-Casting Machine, and I do bequickly and easily operated by men unskilled in the art and adapted tomake successively castings from different metals which require differenttreatment in meltingthem; p

The feature of the invention lies in the quick introduction and therapid expansion or explosion of a gaseous or explosive mixture forforcing the molten metal from the containing crucible into the die,whereby no part of the metal will be deteriorated byoxidization as nowresults in those die casting machines using compressed air to force themetal into the die. Along with the foregoing is the provision of meansfor mounting the crucible and insulating the same to prevent theradiation of heat with a result.-

ing cooling of the metal in the crucible. This construction makes use ofa body oscillatably mounted in a supporting frame with means forclamping the die against the top of the body and in communication withthe crucible held within said body.

The nature of the invention will be understood from the accompanyingdrawings and the following description and claims.

- In the drawings, Figure 1 is an end elevation of the machine withparts brokenaway and showing the means for-securing the die in the mainframe. Fig. 2 is a vertical section on the line 22 of Fig. 1, showingthe meansfor invertin' the container pot and the means for supp ying theexplosive mixture to the crucible. Fig. 3 is a vertical section on theline 3'-3 of Fig. 2, but showing thepot 1n an lnverted position. Fig.4is a horizontal transverse section on the hue 4-4 of Fig. 2, showing themeans for supporting the crucible in the pot. Fig. 5 is a verticalsection on the line 55 of Fig. 2. Fig. 6

Patented Apr. 11, 1916.

is a transverse section on the line 6-6 of:

Fig. 3, showing the as passage inthe sidev of the crucible. Fig. is anelevation similar to Fig. 1, with parts broken'away and with the movableparts turned through an angle of approximately 17 0 degrees, and showingthe gas valve open. Figs: 8 and 9 show the gas valves in elevation andplan, respectively.

In detail there is shown in the drawings.

a pair of A-shaped supportingframes 10 spaced apart at the lower end bythe rods 11 and, provided with bearings 12 at their upper ends fortrunnions 13 which oscillat ably support a crucible container, pot 14..1

or insulating chamber 16 from which the air is exhausted through thepipe 117 extending through the outer wall. The inner chamber wall 114has a number of ribs 17, four being here shown, extendin inwardlytherefrom, and tapering slightly om bottom to top and are provided forthe purpose of holding a crucible or melting pot 18. A nipple 19 screwedinto the walls 14 and '114 of the crucible holder has a two way valve 20mounted on the end and a pipe 21 is con-I nected theretofor supplying agaseous or other explosive mixture under pressure and introducing itinto said chamber 15 when the valve 20 is opened. Pipe 21 has a checkvalve 121.

A cover 22 fits upon the fiat upper ring of-the crucible container 14-soas to make.

an air tight joint therewith and .is secured thereto by bolts 23extending through lugs 24 and 25 cast integralwith the cover 22 s andcontainer 14, respectively, and has an inner or insulating chamber 26from which the air is exhausted through the pipe 27.

There is a downwardly 'tapering conical opening 28 through the cover 22not communicating with the insulating chamber 26 adapted to receive theconical shaped pouring'spout 29;, to be described later. Set

screws 30. extend through the inner andouter walls of said top 22'andhave their ends flare button like for the purpose of holding the coveron the crucible.

The crucible 18 may be of any desired construction, whether of vitrifiedmaterial or of metallic material shell-lined with fire clay, exceptingthat it ,is provided with a small gas opening 31 through the Wall abovethe level which the metal in the crucible will assume when melted andthe crucible is up right. Said crucible fits vdown within the chamberand rests against and is secured by the inwardly extending ribs, beforementioned, and has-a cap 32 adapted to fit over its upper end which hasan inwardly tapering conical hole :in the central portion thereof tocorrespond with the opening 28 in the chamber 22. Said cover 32, whenplaced upon. crucible, is held down by 'thescrews 30. 'The pouring ingconical in shape, may be driven into tight engagement with both thecovers 22 and 32. The outerend of the pouring spout fits into ashouldered-portion in the die 33,

said die being held thereon by means of a I screw 34, having a handwheel 35, keyed thereon and with theupper portion of the screw extendingthrough a frame 36 'mount ed on arms 37 which extend upwardly from thepot 14.

' frames 10'carries a projection 39 whichwill a .An' upward extension 38from one of the engage an L-shaped handle 40 of the two way valve-20when the pot 14 has been revolvedabout'170 degrees and cause the openingof said valve. The air exhaust connections 117 and 27 are provided withpressure gages 41 and valves 42.

. The valve 20., before mentioned, has an L-shaped handle 40 withaspring which is preferably coiled about one leg with one e end insertedin' a hole the valve body and with the other bearing against the other.

leg and tendingto keepsaid valve in a closed position. The free end ofsaid handle is preferably cut obliquely and has the outer part 52connected to the main handle 40 by the spring hinge 53. e y

The oscillating movement 'of the .potmay be limited to 'an arc of 180degrees by the pin 45 in the shaft 13 engaging a projection 46. from oneof the'bearings 12, as shown in Figs. 2 and 5. V

In operation a portion of the air in the inj 'sulating chambersl6 and 26is exhausted in any desired way. The crucible 18 containing.

- moltenmetal which has been melted elsespout 29, projects through" theopening in the crucible cover 22 and, be-

g mme where in any desired way, is placed in the container and the cover32 placed on the crucible after which the cover 22 is placed upon thecontainer 14 and secured thereon by means of the screws 23. The pouringspout 29 is then driven into place, the die adjusted on v the outer endof the spout and tightly secured thereon by turning the hand wheel 35and causing the screw 34 to'wedge against then tilted toward theposition shown in Fig. 7,. by turning the lever 43 on the shaft 13.After the pot has passed a horizontal position, the molten metal in thecrucible 18 .the upper part of the die. The pot 14 is will flow throughthe spout 29 into the die engagement with said} lug the valve is quicklyclosed under the action of the spring 50 on the valve stem. This closing1s accomplished, before the pot reaches the vertical position shown inFig. 3. Thus a gaseous mixture under pressure will be suddenlyintroduced into the chamber 15 and,

passing through the hole 31 in the crucible 18, will meet with themolten metal contained therein, ignite and by the sudden in crease ofpressure resulting therefrom within the crucible the metal will beforced into the die.

This sudden introduction of thecharge of gaseous mixture and theexplosion 1 thereof at a desired time to drive out the metalcloselyresembles the introduction and ignition of the-explosivecharge in thecylinder of an internal combustion engine where the piston is drivenoutwardly by the explosion. After the die has been poured the pot isturned back to its normal position, shown in Fig. 1, and in such,passage the lever extension 52 will again meet the lug 39, but the hinge53 will allow it to pass by said lug'39 without actuating the valvetion. After the machine has been moved .and the "spring in said hingewill cause the extension 52 to return'to its normal posillfi to itsnormal position, the die may be re- Jmoved from'the machine by turningthe hand wheel 35, thus releasing the die. It

will be readily understood that by this means of forcing the metalintothe-die none of the metal will-be oxidized as now results in those j diecasting machines in which the metal is forced into the die by the use ofcompressed My invention is'not necessarily limited to the details of theconstruction which has been herein shown merely for the purpose ofillustrating the general, nature of the in-.

vention. The main feature thereof being the discharge of the metal intothe die by reason of the explosion or quick expansion of an explosivemixture in the crucible and also the employment of the he'atinsulatingcham- 1 her within the potflor surrounding the cru c ible so that thecrucible may be transferred .to. the pot after it has been heatedandsthe metal therein melted in a. separate furnace and yet thecruciblebe prevented from chill-- ing for a reasonable length of time duringwhich by successive die casting operations,

I without removing a number of castings may be made from the same-chargeof metal in the crucible and until all of the metal thereinhas beenused,

the crucible for reheating the metal therein.

I claim as my invention 1. A die casting mach'ne including a cru- Icible adapted to be tilted for discharging. f

the metal into a die, and means for introducv ing a charge of explosivegas into the cru-' cible at thetime of such discharge.

3. A die casting machine including a (mu-- cible with an outlet 'at itsupper end when I upright, a die in connection with said outlet, meansfor tilting the crucible so the metal will flow into'the die, and-meansforintroducing a charge of explosive gas intothe crucible when it istilted. p 4. A die casting machine including a crucible with an outletat its upper end when upright, a die in connection with said out let,means for tilting the crucible so the metalwill flow into the die apassageway into said crucible from a supply of explosive gas underpres's ure,- a valve controlling said passageway, and means for openingsaid valve at the time of the discharge of the metal.

scribed, the combination of a crucible hav- 5. In apparatus of'thecharacter deing an outlet, a die connected to the outlet, and means forintroducing a charge of explosive gas into said crucible.

.6. In apparatus of the'character 'described, the combination of acrucibleh'av;

'ing an outlet, a die connected to the outlct,- I a p the crucible-is innormal pos1t1on,a die, a

-. and mechanism for controlling the flow-of ing an outlet, adiejcginnected'to thezoutlet means .ifor controlling-'the flow ofnietalmetal through the outlet'into the die,'jthe'. said mechanismincluding-means for]intro' ducinga charge of explosive gas into said-,-

crucible. f a v t -7. In apparatus of the character scribed,'thecombinaf'on -of a crucible-ha through the outlet into the die, and meansfor-introducing a charge of explosive gas into said crucible.

8.- In apparatus of the character dew scribed, the combination of acrucible having an outlet and mounted to move bodily to control the flowof metal therethrough, a die-connectedwith the outlet, means for movingsaid crucible whereby the metal therein flows into the die, and meansforintroducing' a charge of explosive gas into the crucible duringmovement thereof.

9. In apparatus of the character de-' scribed, the combination with asupport, of a casting apparatus comprising a crucible adapted toholdmetal in a fluid state, a die,

a conduit leading from said crucible to said die, and means forintroducing a charge of explo's'ivegas into said crucible? means forrotatably supporting said casting apparatus onsaid support, and meanscarried by said support for controlling the supply of exing apparatus. V

10. The combinatio of a crucible for plosive gas during movement of saidcast- I porting said crucible and-provided with a recess into which theopening in the; crucible leads, a die, a conduitlea'ding from the crucible to said die, and means for introducing a charge of explosive gasinto the recess in sald casing.

- .1-1.- In apparatus of the character described, the combination of acasing, a cru- .cible mounted therein and adapted to hold the metal in afluid .state, devices interposed between the crucible and the casingvfor spacing the crucible therefrom to vform a chain: ber,-thesaidcrucible being formed with an opening above the level of the metaltherein,

a die, a conduit between the crucible and the die, andmeans forintroducing a charge of explosive gas into the chamber between thecrucible and said casing.

12. In apparatus of the character dei scribed, the combination of acasing -mounted to move bodily, a crucible mounted therein and adaptedto hold metal in a fluid state,

devices. interposed between :the crucible and the casing for spacing thecrucible therefrom to form a chamber, thesaid crucible being formed,with an openingjin its side wall above thelevel of'the metal therein,when 1311i; f appara'us of. the I icribfd,the-{combination wltha die, ofa 1 character decasing open at its upper end, a top ,fdr said In Witnesswhereof I have hereunto efcasing, a crucible mounted in said casing, afixed my signature in-the presence of the 13 cover for safid crilcible,means carried by the Witnesses herein named.

casin top or c ampin sai cover in positi0n, a conduit betweeii saidcrucible and BENJAMIN CHANDLER said die, means for moving said casing,and Witnesses:

means for introducing a charge of explo- G. H. BOINK,-

sive gas into said crucible. E. H. MAYO.

